CCEventListenerTouchOneByOne OnTouchBegan

Does anyone know if it's possible to make the OnTouchBegan asynchronous? Ideally I'd like to be able to do something like this

layer.AddEventListener(new CCEventListenerTouchOneByOne { OnTouchBegan = OnTouch });
private async Task<bool> OnBuildingTouch(CCTouch arg1, CCEvent arg2)
{
     await RunActionAsync(....);
 }